Calculate the relative lowering of vapour pressure of solution containing 46 g of non volatile solute in 162…

Calculate the relative lowering of vapour pressure of solution containing 46 g of non volatile solute in 162 g of water at $20^{\circ} \mathrm{C}$. [Molar mass of nonvolatile solute $=46 \mathrm{~g} \mathrm{~mol}^{-1}$ ]
  1. 0.89
  2. 0.045
  3. 0.11
  4. 0.06

Solution

Relative lowering of vapour pressure, $\frac{\Delta \mathrm{P}}{\mathrm{P}_1^0}=\frac{\mathrm{W}_2 \mathrm{M}_1}{\mathrm{M}_2 \mathrm{~W}_1}=\frac{46 \times 18}{46 \times 162}=0.11$

Asked in: MHT CET 2024 (16 May Shift 1)

Practice more Solutions questions on Aicharya